How to Choose Lobster — Cold Water vs Warm Water, Hard Shell vs Soft Shell, and How to Read a Frozen Tail
Choose Well, Eat Well How to Choose Lobster Cold water or warm water, hard shell or soft shell, and how to read a frozen tail
By the end of this guide you will be able to pick up any frozen tail in Hong Kong, read the pack, and know whether you are paying for lobster or for water — before it reaches the till.
A lobster tail is one of the few things you can keep in a freezer that will carry a whole dinner on its own. No side dishes required, no technique to hide behind — you split it, you butter it, you put it over heat for eight minutes, and the table goes quiet. It is also one of the few things in that freezer where two packs of the same stated weight, sitting beside each other at very different prices, can contain genuinely different amounts of lobster.
That is the honest problem with buying lobster in Hong Kong. There is a lot of advice about how to pick a live one out of a wet-market tank, and almost none about the thing most of us actually buy: a frozen tail in a plastic bag with a price sticker on it. So nobody has ever told you what separates a good one from a mediocre one.
Here is the short version, and the rest of this guide is just evidence for it. The price tells you almost nothing. Water temperature, shell hardness and how much water is in the pack tell you everything. Cold water means firm and white. A hard shell means meat that actually fills the shell. Honest glaze and a one-word ingredient list mean you are paying for lobster rather than for ice.
Four different animals are sold under one word
Before anything else: "lobster" is not one animal. It is a shopping category that covers at least four, and the differences are not academic — they decide whether there is claw meat on your plate at all.
| Group | Species | HK trade name | Claws? | What you get on the plate |
|---|---|---|---|---|
| American / Maine lobster | Homarus americanus | 波士頓龍蝦（生物學上為美洲螯龍蝦）/ 加拿大龍蝦 | Yes, two large claws | Cold-water clawed: firm white tail meat plus sweeter, looser claw and knuckle meat. The tail is the premium cut. |
| European lobster | Homarus gammarus | 歐洲龍蝦 / 藍龍蝦 | Yes | The closest relative of the American lobster, and rarely seen in Hong Kong retail. |
| Spiny / rock lobster | Panulirus spp. (for example Panulirus argus) | 龍蝦 / 花龍 / 青龍 / 岩龍蝦 | No claws, long whip-like antennae instead | Tail only, no claw meat at all. This is where most "warm-water tails" come from. |
| Slipper lobster | Scyllaridae | 琵琶蝦 / 蟬蝦 | No | Flat and shovel-shaped, with a small tail. A different animal entirely. |
Species facts from NOAA Fisheries; the spiny lobster's antennae-and-no-claws description from UF/IFAS.
The animal behind almost every good frozen tail sold here is Homarus americanus. NOAA Fisheries describes it as fished from Maine down to Cape Hatteras, North Carolina, and jointly managed by NOAA Fisheries and the Atlantic States Marine Fisheries Commission. It is a slow-built animal: NOAA puts it at roughly 20 to 25 moults over five to eight years before it reaches legal size, with a lifespan of around 100 years and a recorded maximum of 44 lb. That slowness matters later, when we talk about why a cold-water lobster eats the way it does.
Now the naming question everyone arrives with. "Boston lobster" is a shipping name, not an origin. Hong Kong and Taiwan trade sources are consistent on this: the animal is the American clawed lobster out of Maine and Massachusetts, and it picked up the Boston nickname because it was historically transhipped through Boston on its way here. It is a real lobster, it is simply named after a departure lounge rather than a home. That is the whole story, and it does not need a second paragraph.
The distinction that actually changes your dinner is the one in the fourth column. A clawed lobster gives you two textures — the dense tail and the looser, sweeter claw and knuckle meat. A spiny lobster gives you one: tail, and nothing else. Neither is wrong. But if you have ever ordered "lobster" and quietly wondered where the claws went, that is the answer.
Cold water or warm water — the one thing to check first
If you only remember one criterion from this guide, make it this one. It sits upstream of price, brand and size.
The mechanism is growth speed. Fulton Fish Market puts it plainly: warm-water lobsters grow larger and faster than cold-water lobsters, while a cold-water lobster at market size — around 1 lb — is typically five to seven years old. Slow growth in cold water builds dense, tightly structured muscle. Fast growth in warm water does not build it the same way.
North Atlantic — Maine, the USA, Atlantic Canada. Firm, white, and clean-finishing. These are the qualities that survive freezing, thawing and a hot grill: a tail that holds its shape when it hits heat and stays in one piece when you lift it off.
Caribbean, Florida, Brazil, Australia. Softer and more variable — not bad, and not unsafe. But softness is exactly what a frozen-then-thawed tail can least afford, because freezing and thawing already cost you a little texture before you have cooked anything.
And now the part most guides skip, because it is inconvenient. The trade genuinely disagrees about taste. There is a loud, sincere counter-position — from cooks and from sellers — that warm-water spiny tails are the sweeter, richer, more interesting eat, and that cold-water lobster is the plainer one. We are not going to pretend that camp does not exist, because we cannot prove a taste hierarchy and neither can anyone else. What we will say is narrower and defensible: cold-water tails are the more consistent buy in a freezer format, and consistency is what you are paying for when the animal has already travelled.
Read the origin on the pack first. USA, Canada, Maine or North Atlantic means cold water. Brazil, Caribbean, Florida, Bahamas or Australia means warm water. Origin labelling is the only genuinely reliable signal here — everything below it is a cross-check, not a substitute.
Look for claws. Claws in the pack photograph, or a tail sold alongside a whole clawed lobster, means you are in cold-water clawed territory.
Read the raw shell colour. A working wholesaler, Mark Drabich of Metropolitan Seafood, gives Fulton Fish Market the cleanest version of this: raw cold-water lobsters with claws have dark shells ranging from brown to olive green, while warm-water or rock lobsters have more colourful tan shells with blue and gold spots and stripes.
Treat black spotting carefully. Black spots on the shell are widely quoted as a warm-water tell, and sometimes they are. But black spotting also has a completely separate and unrelated cause, and confusing the two is the most common mistake in this whole category. Section 06 pulls them apart.
One thing this section is not saying: nothing here makes a warm-water tail a poor choice for a curry, a bisque or a grill where a little softness is not the point. If a warm-water tail is what is in front of you at a price you like, buy it and enjoy it. Just know which one you are buying, so the texture on the plate is the texture you expected.
Hard shell, soft shell, and what you are really paying for
This is the section that will save you actual money, and it is the one the trade discusses openly among itself and almost never with customers.
A lobster grows by shedding its shell. For a stretch after that shed, the new shell is bigger than the animal inside it. The Maine Lobster Marketing Collaborative gives the numbers: a hard-shell lobster generally yields 19 to 22 percent of its weight as meat, while a summer new-shell lobster — the soft-shell — yields 16 to 18 percent. Same word on the label, same weight on the scale, materially less lobster.
Why the gap exists. After a moult there is a space between the meat and the new shell, and that space fills with seawater. The meat is therefore softer, wetter and brighter red, and it does not fill the shell. Hard-shell meat has had time to grow into the space available, so it is meatier, firmer and brinier, and it reads more orange than red.
Why this decides your frozen tail. The same source notes that new-shell lobsters must be packed delicately to stop the shell breaking, while hard-shell lobsters are known to ship and travel well because they are simply a hardier product. A tail that has crossed an ocean and sat in a freezer should have been a hard-shell tail. That is not a preference; it is what the product has to survive.
Now the arithmetic. LobsterAnywhere runs it in public, and once you have seen it you cannot un-see it on a price board.
of cooked meat from a 1 lb hard-shell lobster, at a 21 percent yield.
lobsters of that size to make one pound of meat.
of meat is a normal single serving, according to the Maine Lobster Marketing Collaborative.
So the number that matters is not the one on the sign. It is the live price per pound multiplied by 4.76 — the true price per pound of meat.
Follow that through and the lesson is uncomfortable in the best way: a soft-shell lobster at a lower headline price per pound can cost you more per pound of meat than a hard-shell at a higher one. The cheaper sign was not a better deal. You bought seawater at lobster prices.
LobsterAnywhere also splits the yield by part: roughly 15 percent of live weight in the tail, 10 percent in the claws, 3 percent in the knuckles and 2 percent in the legs. Read that column down and the point lands on its own — the tail is where about half the meat is, and it is the half that comes out in one clean piece rather than in fragments you have to pick.
Which is the pivot for the rest of this guide. Buy a tail and the whole calculation disappears, because you are buying the meat block directly instead of buying a shell with an unknown amount of meat somewhere inside it. The yield question does not have to be answered when there is no yield question. What replaces it is a smaller, more answerable set of questions about the pack — and that is section 05.
Size — the live grades, and the ounce ladder for tails
Two different vocabularies, for two different products. Whole lobsters are sold by trade nicknames; tails are sold by ounces.
If you are ever quoted "a pair of deuces" and would rather not nod politely, this is the ladder. The grades below are as published by LobsterAnywhere and Fulton Fish Market, both accessed on 8 September 2026.
| Trade name | Weight |
|---|---|
| Chix / chicken | 1.0–1.25 lb |
| Quarters | 1.25–1.49 lb |
| Halves | 1.50–1.75 lb |
| Deuces / selects | 2–3 lb |
| Jumbo | 3 lb and up |
| Colossal / super colossal | 5–7 lb / 8 lb and up |
There is a floor and a ceiling under all of that. Maine measures a lobster by its carapace on a state gauge, and the legal window is 3¼ inches to 5 inches. Anything under or over goes back in the water.
Tails are a different vocabulary entirely: they are sized by weight in ounces, and Fulton Fish Market notes that they are broadly proportionate to the body they came from, so a medium tail comes from a medium lobster. Here is the ladder they publish.
| Tail size | Weight | How many people | Best for |
|---|---|---|---|
| Small | 3–4 oz | 1–2 tails per person | Appetiser, pasta, lobster roll |
| Medium | 4–6 oz | 1 tail per person | Surf and turf, broiling, grilling |
| Large Where ours sits |
6–8 oz | 1 generous tail per person | Special dinners, grilling |
| XL / jumbo | 8–10 oz | Split between 2, or indulgent for 1 | Occasions, presentation |
| Colossal | 10–16 oz | Split between 3 | Presentation, grilling, baking |
| Super colossal | 16 oz and up | Split between 3 or more | Centrepiece |
Tail ladder as published by Fulton Fish Market, Lobster Size Chart (accessed 8 September 2026).
The band worth understanding is the third one, because it is where the decision gets interesting. 7–8 oz sits at the top of "Large": one generous tail per person, and the largest size that is still comfortably a single portion. Go a step up and you are into territory that most people share, which is a different kind of dinner — grander, but no longer one plate, one tail, one person.
One correction that comes up constantly. A 7–8 oz tail is shell-on. The ounces are the tail, not the meat — the meat weighs less than the pack weight, always. An 8 oz tail is never 8 oz of meat, and any seller implying otherwise is doing arithmetic in their own favour.
Reading a frozen tail pack
Four things are printed or visible on every pack, and between them they answer nearly everything: whether it is raw, where it came from, how much of the weight is ice, and whether anything was added to hold water in.
Raw or already cooked? You can see this without reading a word. LobsterAnywhere describes the difference exactly as it appears through the bag: pre-cooked frozen lobster shows a bright red shell and opaque white meat, while raw frozen shows a dark brown or olive-green shell and translucent meat. Both are legitimate products. They are simply not interchangeable.
What we sell is raw frozen, and it is worth saying why that is the version we chose. With a raw tail, the cook controls the doneness. A pre-cooked tail has already had its one chance at the right temperature taken by somebody else, in a factory, with no idea how you were going to reheat it. A raw tail can be pulled at the tender end of the window instead of arriving at the far end of it, which — as section 08 explains — is the entire difference between lobster and an expensive eraser.
Glaze — the ice that should not be in the price. Glaze is a thin coat of ice applied to frozen tails to protect them from freezer burn in shipping and storage, and the Maine Lobster Marketing Collaborative treats it as normal, functional practice. It is not a trick in itself. The trick is only in how it is weighed.
Codex Alimentarius CXS 190-1995 is explicit: where a food has been glazed, the declared net weight must exclude the glaze. The ice is not the product and is not supposed to be counted as the product.
So the honest test is not "is there glaze on this". It is declared and deducted, or undeclared and paid for. We are deliberately not going to tell you what percentage of glaze is normal, because no authority we could find sets a figure for lobster tails, and a number invented to sound authoritative is worse than no number.
Soaked tails and phosphates. Sodium tripolyphosphate — STPP on an ingredient list — makes seafood absorb and hold water. The product swells, weighs more, and looks firmer and shinier on the shelf. A weight gain of 7 to 10 percent is commonly cited in the trade, and that is exactly how we will present it: a widely repeated trade figure, not a standard, and not a rule.
Read the ingredient list. An untreated tail's ingredients read "lobster". If sodium tripolyphosphate, phosphates or STPP appear, it has been treated. This is the only test you can run in the shop, and it is the reliable one.
Watch the pan. The Fish Site describes the giveaway of a soaked product: it weeps a milky white liquid during cooking and visibly shrinks. If a tail loses noticeable size on the heat, you now know what left it.
One fairness note, because this subject invites cynicism. Frozen lobster meat — picked meat, not tails — is often shipped in a brine pack on purpose, and the industry defends the practice as protecting flavour and texture against a dry pack that dehydrates on thawing. Added liquid is not automatically fraud. Undeclared added liquid that you paid lobster prices for is.
Shell. Dark brown to olive-green, hard and intact, with no crushing.
Raw meat. Translucent white with a hint of grey. The Reluctant Gourmet flags discoloured meat — pink, yellow or greenish — as a warning sign.
Glaze. An even, thin, clear film of ice — not a thick opaque crust and not a frost-filled void.
Pack. Origin stated, net weight stated, and a short ingredient list.
Storage. The Centre for Food Safety puts frozen seafood at −18°C or below. That applies to the shop's freezer as much as yours.
Those black spots are three different stories
This is the part of the subject where good advice goes wrong, because three unrelated things look similar and get filed under one worry.
Ask about dark marks on a lobster shell and you will be told, confidently and in the same breath, that they mean warm water, that they mean the lobster is old, and that they mean it has gone off. Those are three separate claims about three separate phenomena, and at least two of them are wrong in any given case. Here they are, apart.
A cosmetic oxidation, and the most misread mark on any crustacean. The Global Seafood Alliance is direct about it: melanosis has no impact on flavour and is not harmful, but the black spots drastically affect how the product looks — which is why the industry works so hard to prevent it.
Some processors use sulfites to stop it forming, and where they do, sulfites must be declared on the label. That is the whole of what you need to know here: a cosmetic issue, and a declarable ingredient if it was treated.
Plenty of warm-water and spiny tails simply have tan, mottled shells carrying blue-gold spots and stripes. That is not damage, not age and not a defect — it is the pattern the species is born with, and it is the same pattern section 02 used as a cross-check for identifying a warm-water tail in the first place. A spotted spiny tail is a spiny tail behaving exactly as expected.
Discolouration in product that has been mishandled — and crucially, it never turns up alone. Spoilage announces itself with company: an off or ammonia-like smell, and meat that has gone mushy. Marks with no smell and no softness are almost certainly one of the first two stories. Marks arriving with both are the one time to put the pack down.
We have not found another buying guide, in English or Chinese, that separates these three. Most pick whichever one suits the point they were already making. That conflation is the single reason this article exists — because a shopper who cannot tell a cosmetic mark from a spoilage sign will either overpay to avoid a harmless one, or wave through a real one.
There is a broader habit worth taking away from this. Colour genuinely does tell you a great deal about seafood — but very often not the thing people assume it does. We unpicked exactly the same reflex on the fish counter in our guide to what salmon colour really means, and the reader move is identical: find out what the colour is before deciding what it means.
Buying a live or whole lobster, which we do not sell
Straight up: iBuddies does not sell live lobster or whole lobster. We sell one frozen tail, and that is section 09. This section teaches you to buy something we do not stock, because you asked and because the answer belongs in a guide called How to Choose Lobster. If you want a whole lobster this weekend, take this to the market and buy a good one there.
The clearest Hong Kong guidance we found comes from chef Lui Kai-yu, quoted by HK01 on 12 September 2023 after a viral post about cheap market lobsters. Four points, and they are all things you can check standing at a stall.
If it is alive, buy a lively one. Slow, weak claws and legs mean it is not fresh. Vigour is the whole test.
If it is not alive, check the neck is tight. Any separation between head and body means it has been dead a while. This is the point the chef is most emphatic about, and it is the easiest to see.
White, dull meat means do not buy. The longer a lobster has been dead, the whiter and duller the meat goes — and stalls that sit dead seafood in ice water speed that up.
Do not buy one the stall has already split open. Once it is opened you cannot judge it, and you have no idea when it was opened.
One Western cross-check worth adding, from LobsterAnywhere, because it connects straight back to section 03: judge the heft for the size. A hard-shell lobster feels heavy and full for its length. A soft-shell feels light for the same length, and the shell gives a little under thumb pressure. Two lobsters of the same size in your two hands will tell you which one is carrying meat and which one is carrying seawater — no scale, no label, no discussion required.
Thawing it, cooking it, and why it goes rubbery
You can buy the best tail in Hong Kong and undo all of it in the last ten minutes. This is the part that is entirely in your hands.
Thaw it in the fridge. The Centre for Food Safety is unambiguous: thaw frozen seafood in a refrigerator at 4°C or below, and it notes that doing so is not only the safe method but also the one that preserves the seafood's freshness and flavour. CFS separately lists thawing at room temperature and thawing quickly in hot water as incorrect practice. Both of those shortcuts cost you texture as well, which is the part nobody mentions.
In practical terms, LobsterAnywhere puts a frozen tail at 12 to 24 hours in the fridge to thaw completely, and advises never cooking one from frozen. Plan the meal the night before and this stops being a constraint.
Then, how do you know it is done? Three answers exist, they disagree, and the honest thing is to show you all three rather than pick the one that flatters a recipe.
| Who says it | The target | What it means for you |
|---|---|---|
| FoodSafety.gov, the US regulator, for shellfish specifically | No number. Cook until the flesh is pearly or white, and opaque | This is the cue to actually cook by. The regulator gives shellfish a visual target rather than a temperature, and so should you. |
| USDA FSIS | 145°F / 63°C for fish and shellfish | The regulator's number. Use it if you own a thermometer, and stop right there. |
| Chefs and the seafood trade | Commonly pulled at 135–140°F / 57–60°C | A texture preference that sits below the regulator figure. We report it because it is what the trade does — it is not our recommendation. |
The one food-safety note that belongs here, and then we will get back to cooking: the Centre for Food Safety names crustaceans — crab, lobster and shrimp — among the food groups associated with Vibrio parahaemolyticus, which is the plain reason a lobster tail is cooked through rather than served rare.
Why an overcooked tail goes rubbery. LobsterAnywhere explains the mechanism well: above roughly 145°F the proteins contract too aggressively, squeezing out moisture and producing that tough, chewy texture. The same source makes the point that matters for technique — unlike white fish, lobster meat has long muscle fibres and does not flake when cooked. That is why it reads firm and meaty rather than flaky, and why it needs tighter temperature control than a fillet of fish does. Fish forgives a minute. Lobster does not.
Which gives you the only rule you really need at the grill. An undercooked tail goes back on the heat for two minutes. An overcooked one is finished for good. The error is not symmetrical, so stop a hair short.
Butterfly it. Fulton Fish Market recommends butterflying larger tails specifically to get them cooking evenly, and at 7–8 oz that advice has started to apply. Split the shell down the back, lift the meat so it sits on top of the shell, and the thick part of the tail stops lagging behind the thin part. It also happens to look like the version you order in a restaurant, which is not the reason to do it, but it is not nothing.
Four methods for a tail this size. Every time below is published as an approximate figure by the source named beside it, so treat them as a guide to when to start checking — the visual cue in the table above is what actually decides.
| Method | Prep | Roughly how long for a 7–8 oz tail | Source |
|---|---|---|---|
| Butterflied and grilled | Split the shell down the back, lift the meat to sit on top of the shell, brush with butter | About 5 minutes on the first side, then 4–5 minutes over medium heat | Food52, with grilling expert Paula Disbrowe |
| Broiled with garlic butter | Butterflied, about 15–20 cm under the broiler | The trade rule of thumb is about 1 minute per ounce, so roughly 7–8 minutes | Wholesome Yum; Tastefulventure |
| Steamed | Whole in the shell, over about 5 cm of water | No reliable published time for this size. Cook to the visual cue, not the clock — we would rather leave this blank than invent a number | — |
| Butter-poached | Meat out of the shell, into a gentle butter bath kept well below a simmer | About 8–10 minutes, turning once and spooning the butter over | Cooking with Cocktail Rings |
What we stock, honestly
One product, one size, and a short list of things we do not sell.
Our lobster range is a single item: USA 7-8oz Lobster Tail. Cold-water, raw frozen and uncooked, 7 to 8 oz per tail. Measured against Fulton's ladder in section 04, that puts every tail at the top of the "Large" band — one generous tail per person, and the largest size that is still comfortably a single portion rather than something to share.
Everything this guide argued for is the reason it is the one thing we carry. Cold water, because a tail that has been frozen cannot afford to start soft. Raw, because the cook should own the doneness. A tail rather than a whole lobster, because it removes the yield question instead of asking you to solve it in a shop.
2 pieces — dinner for two, one generous tail each.
10 pieces — for a table, or for a freezer you plan ahead with.
No live lobster. No whole lobster. No warm-water tails. If any of those is what you want, this guide has told you how to buy one properly somewhere else, and we would rather be the article that did that than the shop that pretended to stock everything.
Delivery is free on orders over HK$800. Self-pickup is available at Chai Wan, Tai Wai and Po Lam.
Put one on the grill this weekend
Tell us how many are eating and we will tell you which pack size fits, and what is in the freezer room right now. Thaw it overnight, butterfly it, and give it under ten minutes.
Order lobster tails on WhatsAppOr see what else is in the cold room: our seafood collection.
References & Resources
This is a culinary buying guide. Species facts, yields, size grades, labelling standards, storage and thawing points are drawn from the primary and industry sources below; cooking times are from named recipe and trade sources and are published as approximate figures. Last reviewed: 8 September 2026.
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NOAA Fisheries — American Lobster. Range, management, moult count, lifespan and maximum size.
https://www.fisheries.noaa.gov/species/american-lobster -
NOAA Fisheries — Caribbean Spiny Lobster. The clawless warm-water species behind most spiny tails.
https://www.fisheries.noaa.gov/species/caribbean-spiny-lobster -
Maine Lobster Marketing Collaborative — Why Make It Maine? Questions to Ask Your Purveyor. The 19–22% and 16–18% yields, the new-shell mechanism, shipping durability, glazing, brine packing and the 4 oz serving.
https://lobsterfrommaine.com/article/why-make-it-maine-questions-to-ask-your-purveyor/ -
Fulton Fish Market — Lobster Size Chart. The tail ounce ladder, the growth-rate comparison, the raw shell-colour tell and the butterflying advice.
https://fultonfishmarket.com/blogs/articles/lobster-size-chart -
Codex Alimentarius CXS 190-1995 — Standard for Quick Frozen Fish Fillets. The net-weight rule: a declared net weight excludes the glaze.
https://openknowledge.fao.org/bitstreams/8e446e3e-175d-46bf-badb-96bc51165952/download -
Global Seafood Alliance — Preventing melanosis in shrimp. Black spot as a cosmetic oxidation with no impact on flavour.
https://www.globalseafood.org/advocate/preventing-melanosis-in-shrimp/ -
Centre for Food Safety (CFS), Hong Kong — Food Safety Bulletin, Issue 4 of 2014. Frozen seafood at −18°C; thawing in a refrigerator at 4°C.
https://www.cfs.gov.hk/tc_chi/multimedia/multimedia_pub/multimedia_pub_fse_201404.html -
USDA FSIS — Safe Minimum Internal Temperature Chart. 145°F / 63°C for fish and shellfish.
https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/safe-temperature-chart
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